中大機構典藏-NCU Institutional Repository-提供博碩士論文、考古題、期刊論文、研究計畫等下載:Item 987654321/85838
English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 80990/80990 (100%)
造訪人次 : 41762260      線上人數 : 2040
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
搜尋範圍 查詢小技巧:
  • 您可在西文檢索詞彙前後加上"雙引號",以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋,建議至進階搜尋限定作者欄位,可獲得較完整資料
  • 進階搜尋


    請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/85838


    題名: 藉由點擊化學製備穀胱甘?控制藥物釋放之胜?微脂體;Using Click Conjugation to Generate Glutathione Responsive Peptidyl Liposome
    作者: 鄭仁華;Jheng, Ren-Hua
    貢獻者: 化學學系
    關鍵詞: 穀胱甘?;膜活性多?;引信釋放;以穀胱甘?為引信響應的多?微脂體;glutathione;membrane active peptide;triggered release;GSH-responsive peptidyl liposome
    日期: 2021-09-01
    上傳時間: 2021-12-07 11:32:28 (UTC+8)
    出版者: 國立中央大學
    摘要: 穀胱甘?是生物體內一種相當重要的小分子硫醇,其能扮演抗氧化劑來調節細胞的氧化還原壓力之外,同時也參與多項的生理代謝反應。再者,由於大部分腫瘤組織中穀胱甘?的濃度皆為正常組織的數倍,此濃度的差異對於治療癌症的奈米載體而言,被視為一個良好的引信訊號來促使藥物釋放。過去有許多以穀胱甘?為引信的微脂體藥物陸續被開發,其中大多數的研究皆以利用具有還原應答能力的非天然性磷脂質來作為微脂體的主要脂質組成,但此種磷脂質可能造成生物相容性上的相關疑慮。在本研究中,我們利用自然界的膜活性胜?為基礎,成功開發了以穀胱甘?為引信的破膜胜?,並且此狀態下的破膜活性會被胜?序列上的遮蔽區塊抑制。由於此多?有硫醇敏感設計,與傳統多?與微脂體的硫醇與丁二醯亞胺反應不相容,因此需開發新的多?與微脂體共軛聯結方式。透過張力促使的疊氮-炔烴的環加成反應,我們成功地將此胜?修飾於微脂體的表面上,也成功地促使引信穀胱甘?可以控制微脂體的藥物釋放。從多?的還原測試實驗中,可以發現此引信響應的胜?可對於穀胱甘?具有引信響應的能力,並同時轉變成具有高破膜活性的多?型式。在藥物釋放方面,引信響應的多?微脂體與腫瘤濃度下的穀胱甘?作用後,其會造成較高比例藥物阿黴素的釋放。最後,我們藉由分析胜?的圓二色光譜,發現此胜?在與引信作用後,會造成胜?兩親媒性二級結構上的增加,進而影響微脂體的藥物釋放。;Reduced glutathione (GSH) is an important low-molecular-weight physiological thiol that can be serve as antioxidant for balancing the redox environment of cells and adjusts many significant biological metabolisms. Because of the concentration of glutathione in cancerous tissue is higher than normal level, it can be used as a good triggering signal for nanocarrier to release drug. As a result, a lot of liposomal drugs that can be triggered release by glutathione have been developed in the past decade. However, most liposomes mentioned above are composed of thiol-responsive “unnatural” phospholipids, which have potential safety issue. In this study, we intend to develop a GSH-responsive peptidyl liposome which is more biocompatible. The designed thio-responsive peptide is not compatible with conventional thiol-maleimide chemistry to conjugate onto liposome, and new cross-linking chemistry is needed. We successfully developed peptide-to-liposome conjugation by strain-promote azide-alkyne cycloaddition. We also successfully induce the reductive cleavage of the GSH-responsive peptide on liposome and trigger liposome release. Finally, through the circular dichroism analysis, we discovered the correlation between amphiphilic helicity of liposomal peptide and liposome release.
    顯示於類別:[化學研究所] 博碩士論文

    文件中的檔案:

    檔案 描述 大小格式瀏覽次數
    index.html0KbHTML110檢視/開啟


    在NCUIR中所有的資料項目都受到原著作權保護.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 隱私權政策聲明